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Broadband dual-mode plane end-on-fire circularly polarized antenna

A circularly polarized antenna and planar technology, applied in the microwave field, can solve problems such as difficult to meet the bandwidth requirements of communication systems, and achieve good circularly polarized characteristics, small size, and simple structure

Inactive Publication Date: 2016-09-28
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relative bandwidth of this planar end-fire circularly polarized antenna is generally only a few percent.
It will be difficult to meet the bandwidth requirements of the communication system

Method used

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  • Broadband dual-mode plane end-on-fire circularly polarized antenna
  • Broadband dual-mode plane end-on-fire circularly polarized antenna
  • Broadband dual-mode plane end-on-fire circularly polarized antenna

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0034] like figure 1 and figure 2 As shown, the present invention discloses a broadband dual-mode planar end-fired circularly polarized antenna, which includes a dielectric substrate and a non-closed semicircular magnetic dipole structure arranged on the dielectric substrate;

[0035] The upper surface of the dielectric substrate is provided with a first phase shift line, a first fan-shaped annular electric dipole arm and a first tuning branch, and the lower surface is provided with a second phase shift line, a second fan-shaped annular electric dipole arm and a second Two tuning branches;

[0036] The upper surface of the magnetic dipole structure is connected to the first electric dipole arm through the first phase shift line, and the lower surface is connected to the second electric dipole arm through the second phase shift line;

[0037] Th...

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Abstract

The invention discloses a broadband dual-mode plane end-on-fire circularly polarized antenna. Fan-shaped annular first electric dipole arm and second electric dipole arm which are identical in structure, same in size and arranged in an anti-symmetric manner are designed on a dielectric substrate having a relative dielectric constant in a range of 1-20. A semi-circular magnetic dipole structure is introduced for connecting with the first electric dipole arm and the second electric dipole arm and the magnetic dipole is concentric with the two electric dipole arms. At the same time, two pairs of tuning stubs are added at identical positions of the two electric dipole arms correspondingly. The tuning stubs added on the electric dipole arms are used for antenna bandwidth expansion. A polarized beam synthesized by the plane magnetic dipole and the plane electric dipole is parallel to the plane with the antenna. According to the invention, the combined antenna adopt a single-point feed method, the bandwidth of the antenna is over two times greater than that of antennas of the same kind. The antenna provided by the invention has characteristics of simple structure, low profile, small size, low manufacture cost and the like and the application range is very wide.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a broadband dual-mode planar end-fired circularly polarized antenna. Background technique [0002] The practical significance of circularly polarized antennas is mainly reflected in: 1. Circularly polarized antennas can receive incoming waves of any polarization and their radiated waves can also be received by any polarized antenna, so circularly polarized antennas are generally used in electronic reconnaissance and jamming ; 2. The rotation orthogonality of circularly polarized antennas is widely used in applications such as communication, radar polarization diversity, and electronic countermeasures; 3. When circularly polarized waves are incident on symmetrical targets (such as planes, spherical surfaces, etc.) The direction is reversed, so circularly polarized antennas can suppress rain and fog interference and anti-multipath reflection when used in mobile communications, G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q9/16H01Q1/38H01Q1/50
CPCH01Q9/16H01Q1/38H01Q1/50
Inventor 吕文俊高琛袁成莹朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM
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